Determination of pesticide multiresidue in kiwifruit by magnetic nanoparticles adsorbent purification and ultra performance liquid chromatography- tandem mass spectrometry

doi:10.3724/SP.J.1123.2016.03026

Abstract

Abstract:

A simple and fast sample purification method was developed based on magnetic nanoparticles. The present work aimed at purifying the analytes by removing the matrix interferences. Magnetite Fe₃O₄ nanoparticles modified with N-(n-propyl)ethylenediamine (Fe₃O₄-PSA) and the commercial C18 were selected as the cleanup adsorbents. They can remove the target interferences of the matrixes, such as organic acids and non-polar compounds. The amounts of Fe₃O₄-PSA and C18 were systematically optimized for selecting the suitable purification conditions. The simultaneous determination of 52 pesticides and 8 related metabolites in kiwifruit was established by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). Method validation was performed including the linearity, sensitivity and matrix effect of the method. The results displayed that these pesticides showed good linearities ranging from 2 to 250 μ g/L. The recoveries of the kiwifruit samples at three spiked levels ranged from 76.0% to 121% with the relative standard deviations (RSDs) less than 13.8%. Compared with the QuEChERS method based on PSA and C18, the present method can save the pretreatment time, giving the high throughput analysis possible. It can also satisfy the requirement of the pesticide residue analysis, displaying good application prospect and provide a novel method for rapid determination of pesticide multiresidue in kiwifruit.

Key words: Fe₃O₄ nanoparticles modified with N-(n-propyl)ethylenediamine (Fe₃O₄-PSA), kiwifruit, pesticide multiresidue, ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS)

CLC Number:

O658

LIU Zhenzhen, QI Peipei, WANG Xinquan, CHEN Wenxue, WU Liyu, WANG Qiang. Determination of pesticide multiresidue in kiwifruit by magnetic nanoparticles adsorbent purification and ultra performance liquid chromatography- tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2016, 34(8): 762-772.

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